package tel;

public class ThirdTel extends SecondTel {
    public String vedio(){
        String str="手机可以看视频";
        return str;
    }
    public String music(){
        String str="手机可以听音乐";
        return str;
    }
    public String connection(){
        String str="我是ThirdTel的connection";
        return str;
    }
}
